Doumit has made 60 starts in right field in his career, including six starts this season, but never in left. He saw some time there during Spring Training and has been taking fly balls in left field the last few days.
"I already talked to Doumit about going out there," Twins manager Ron Gardenhire said. "He's already been out there taking fly balls and watching balls. He was excited about it, to tell you the truth."
Gardenhire added that Doumit is making the start in left instead of right because of Ben Revere's success in right field this season.
"I know he feels a little more comfortable in right field, but I'm really happy with Ben Revere out there," Gardenhire said. "Ben's really good in right field, and [Denard] Span is in center. So this is the chance to give Willingham the break he needs. He's played a lot of baseball."